Coleopierological Notices, IV. 101 



basal margin, the latter much narrower than the disk, which is convex, 

 coarsely, deeply but not densely punctate, witli a smooth apical margin ; 

 median line obsolete. Elytra a little wider behind, nearly one-third wider 

 than the prothorax and more than twice as long, three fourths longer than 

 wide ; sides nearly straight, rounded, convergent and feebly constricted in 

 apical third, the apex narrowly subtruncate ; striae coarse, feebly impressed, 

 the punctures coarse, rounded but not very close-set ; intervals nearly flat, 

 feebly elevated, but slightly wider than the strial punctures, each with a 

 single series of fine but distinct punctures. Metasternum coarsely and closely 

 punctured, the abdomen more finely and sparsely so. Length 2.3-2.6 mm. ; 

 width 0.7-0.9 mm. 



Florida (Biscayne Bay). 



This species differs from nitens in its smaller size, narrower form, 

 coarser strise, larger punctures, sculpture of the beak, and rather 

 more widely separated anterior coxge ; from piceus it may be known 

 at once by its color, more polished surface, and very much more 

 coarsely punctured pronotum. Three specimens. 



NYSSONOTUS n. gen. 



The principal characters distinguishing this pentarthride genus 

 may be stated as follows : — 



Body cylindrically convex, deeply and closely sculptured, setose. Beak 

 thick, short, parallel, arcuate toward apex, not separated from the head by 

 a transverse impression. Antennse inserted a little behind the middle, the 

 scrobes deep, beginning beyond the middle, thence straight and feebly de- 

 scending nearly to the lower limit of the eye, thence abruptly transverse 

 beneath ; scape short, a.s long as the first three joints of the fuuicle, the latter 

 5-jointed, the basal joint large, two to five feebly obconical, subequal, a little 

 wider than long; club abrupt, compressed, oval, with the basal joint large. 

 Eyes moderate, rather finely faceted, subdepressed, at the sides of the head 

 and very remotely separated. Scutellum distinct. Metasternum long. An- 

 terior coxae extremely approximate, the intermediate rather widely separated. 

 Legs nearly normal, external tibial uncus well developed, the anterior also 

 with a short internal terminal spur ; tarsi short, thick, the third joint slightly 

 dilated, deeply emarginate, the fourth slender, fully as long as the preceding 

 three together. 



Nyssonotus is closely allied to Pseudopentarthrum, but diflers in 

 the obliquely descending and not horizontal antennal scrobes, in 

 the longer beak, still more widely separated and lateral eyes, and 

 in the stiff erect and bristling setae. 



N. seriatUS n. sp. — Cylindrical, feebly shining, black, the upper surface 

 throughout with very short erect stifi" setae, sparsely placed but forming a 



